Average time I can stay logged in: 30-45 seconds.
Once I get booted, I have to completely exit from the game then rerun the launcher, otherwise 90001/90002 errors.
EDIT: Just tried PotD F51. Ran fine for 3 minutes, then booted as usual, but now I CAN'T EVEN LOG IN.
[30605][10009][10020]
WHAT ARE YOU PEOPLE DOING OVER THERE?!